| Abstract |
The preparation of the mixed-ligand Rev complexes [Re(O)(kappa -SSS)(kappa -Simz)] (1), [Re(O)(kappa -SSS)(kappa -Simz)]-HCl (2) and [Re(O)(kappa(2)-SSS)(kappa(1)-SimzCOGlyGly)] (3) are described. These [3+1] type compounds are stabilized by tridentate bis(2-mercaptoethyl) sulfide (HSSSH) and by monodentate functionalized thioimidazolyl ligands. Complexes 1, 2 and 3 were fully characterized by IR and H-1 NMR spectroscopy, and by X-ray diffraction analysis in the case of 1 and 2. In complexes 1 and 2 the Re atom is five-coordinate, presenting a distorted square pyramidal coordination geometry. Based on the angular structural parameter, tau, this distortion lies towards a trigonal bipyramidal geometry (tau = 0.40, 1; tau = 0.46, 2). ((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002) |
